I have used my bundled data(100 MB) and now it is showing $10 additional data charges on self serve, but I have not used any additional data. Do they still charge $10 if i will not use any additional data. PS- I am on $30 monthly plan.
100MB is also a very very small amount. I use that up in one 20 minute ride to work sometimes. If your usage indicates you are exceeding your plan's allotment, then you should look into changing plans to something with more data. This is 2016, not 2010. Phones eat up more data than ever.